Fastening devices for doors and the like



Jan. 5, 1960 A. TANNEN 2,919,945

FASTENING DEVICES FOR DOORS AND THE LIKE Filed June 6, 1957 2Sheets-Sheet 1 p INVENTOR- Al FKFD FA/V/Vf/v W M M W W ATTORNEYS.

Jan. 5, 1960 A TANNEN FASTENING navxcszs FOR DOORS AND THE LIKE 2Sheets-Sheet 2 Filed June 6, 1957 ATTORNEYS United States Patent v."

FASTENING DEVICES FOR DOORS AND v THE LIKE This invention relates tofastening devices for doors and the like, e.g. casement windows (allhereinafter inclusively called doors)vfor'preventing such doors beingopened wider than a predetermined amount which is insufi'icient topermit the passage of a person through the doorway and which arereleasable from the inside of the doorway in order to permit fullopening of the door. Such fastening devices are typified by the wellknown chain which has been in use for many years.

An object of the present invention is to provide an improved fasteningdevice of this general type, and in which the said device is adapted toco-operate with the key I actuated lock normally provided with a doorwhereby the fastening device is normally in the operative condition tolimit openingrof the door when the door is shut but when the proper keyis inserted in the lock in thenormal manner outside the door to unlockand open the door, the fastening device is actuated to free the door forcomplete opening, and, upon re-closing the door, the fastening devicewill return to its operative position to function as a stop againstopening beyond the aforesaid predetermined amount.

A furtherobject of the present invention is to provide as the devicewhich limits the opening of the door a slidable bolt adapted to becarried by the door and-which normaly engages atone end in a guidewayprovided in an arm adapted to be pivotally connected at one end to thejamb post of the door so that the said end of the bolt will slide alongthe guideway until it abuts against a terminal part of the guideway nearthe free end of the arm to prevent further opening of the door, and inwhich when it is desired to free the door for complete opening the boltmay be pulled by a person on the inside of the door away from the arm todisengage the said end of the bolt from thearm, and also so to connectthe bolt to the normal lock of the door that when a person with theproper key unlocksthe lock, such unlocking operation I will also betransmitted to said bolt to disengage it from saidarm. j A still furtherobject of the present invention is to provide means which will safeguardagainst unauthorised manipulation of the said'bolt away from said arm bya person from outside the door when the door is secured only slightlyopen by the interengaging bolt and arm, and for which object the head ofthe bolt is enlarged and the said guide is a groove which is undercutfor the major portion of its length whereby such disengagement ispositively prevented except when the door is completely shut.

The arm may be mounted upon the jamb post in such a manner as to pivotabout a horizontal or vertical axis but it is preferred to employpivoting about a horizontal axis as in this case the weight of the armmay be used to return it to a position close to the jamb post, whereasif the pivoting takes place about a vertical axis a spring or othermeans may be necessary to cause its return.

The bolt is preferably spring urged into its operative position and, inorder to permit ready closing of the door,

, reaches the end of this groove, thus preventing the door 2,919,945Patented Jan. 5, 1960 opposed cam facesmay be provided on the end of thebolt and on the arm in order to cause movement of the bolt into awithdrawn position followed by its return under spring pressure toengage the arm as the door is closed. f In order that the invention maymore readily be understood certain embodiments will be described withreference to the accompanying drawings, in which:

Figure l is a rear elevational view of a door having a fastening deviceof this invention applied thereto;

Figure 2 is a section on the line II-II of Figure 1, but showing thedoor partly opened;

Figure 3 is a scrap view corresponding to Figure 1 and showing a furtherembodimenfland Figure 4 is a section on the line IV- IV of Figure 3,.

but showing the door partly opened.

:In'the embodiment illustrated in Figures 1 and 2, an arm 1 having agroove2 in one side thereof is pivoted to a member 3 adapted to besecured by screws to the jamb post 4 of the door so as to be pivotalabout a horizontal axis, the weight'of the arm 1 normally maintaining itin the vertical position shown in Figure '1. A housing 5 is secured tothe door adjacent to its edge and this housing supports a bolt 6 whichis urged'by a spring 7 towards the arm 1, a knob 8 protruding through aslot 9 in the housing 5 .servingto withdraw the bolt 6 against theinfluence of the spring 7 as will hereinafter be apparent. The head 10ofthe bolt 6 is normally engaged in the groove 2 so that when the dooris opened the arm 1 is caused to pivot relatively to the member 3 asillustrated in Figure 2 and the head 10 of the bolt will slide down thegroove 2 until it being opened any further. Obviously the door may befully opened by actuating the knob 8 to withdraw the head 10 from thegroove 2 and, in order to permit closing of the door without actuationof the knob 8, the head 10 is slightly rounded at its end and the outerside of the arm 1 is'provided with a cam surface 11 which, on engagementwith the head of the bolt, will cause the latter to be displaced againstthe action of the spring 7 to permit its snapping into the groove 2.

{Asshown in Figure 1, the door is provided with a cylinder lock 12 ofthe type sold under the registered trade mark Yale and in order topermit actuation of the bolt 6 to free the door when the lock 12 isopened by means of its key, the tongue 13 which is coaxial with thecylinder in such locks is engaged in a slot in a short lever 14,whichhas pivoted to the other end of it about a pivot pin 15,a1ink 16which extends between'the lock 12 and the housing 5. At its other end,the link 16 is pivoted by a pin 17 toone corner of a triangular cammember 18 which is pivoted by a pin 19 to the housing 5, this cam member18 hearing against a projection 20 on the rear. side of the knob 8. Thuswhen the cylinder of the lock 12' is'turned by means of its key, thetongue 13; will rotate and cause rotation of the short lever 14 in theanticlockwise direction and therefore movement of the link 16 in thedirection of the arrow A. Thisin turn will cause anticlockwise movementof the cam member 18 and withdrawal of the bolt 6.

In the embodiment illustrated in Figures 3 and 4, the construction ofthe housing 5 may be substantially the same as that illustrated inFigures 1 and 2 but the construction of the arm differs. Thus as may beseen from Figure 3, the arm 1' is pivoted to the member 3' by means of apair of vertically extending pivot pins 21 and 22, the pivot pin 22having a torsion spring 23 engaged therewith in order to cause the arm 1to normally be maintained in the position in which it is flat againstthe jamb post. In this embodiment of the invention, the groove 2' is onthe front side of the arm 1 and as can be clearly seen from Figures 3and 4 is of undercut formation. The head 10' of the bolt 6 is of partspherical formation and engages closely in the groove 2', the inner andopen end of the groove 2' being radiused and lipped as at 2a to enablethe head to be cammed against the influence of the spring 7 over the endof the groove 2' so that as the door moves into the closed position thehead 10 is snapped into the groove 2'. It will be understood that inboth embodiments herein described the groove 2 is a channel as distinctfrom a slot so that the channel loosely embraces the head 10 to minimisefriction, the radiused formation of the head acting somewhat as a sphererunning in a channel. It will be observed that, although the head it?may be withdrawn from the groove by movement of the bolt 6 in thedirection of the arrow B of Figure 3 when the door is in the closedposition, as soon as the door is partially opened the fact that the bolthead 10 is larger than the entrance to the slot 2 will preventwithdrawal of the bolt 6 to permit free opening of the door, therebypreventing anyone who has forced the door partially open from releasingthe fastening device. Obviously the shape of the bolt head and groovedescribed with reference to Figures 3 and 4 may be applied to theconstruction described with reference to Figures 1 and 2 if desired.

In order to render the fastening device inoperative, if this should bedesired for any reason, catch means may be provided for retaining theknob 8 in its withdrawn position but such catch means are notillustrated in the drawings.

A hole 24' is provided in the arm 1' adjacent to its end and acorresponding hole 27 is provided in the bolt head, a screw or pin 25may be inserted through these holes for the purpose of holding the doorslightly open, e.g. to obtain air.

I claim:

1. A fastening device for doors comprising an arm, a lengthwise guidewayin said arm, a bracket member adapted to be mounted on the jamb post ofa door, means pivotally connecting one end of said arm to said bracketmember, a housing adapted to be mounted on the door, a bolt slidable insaid housing and projecting at one end beyond one end of said housing, ahead on the latter end of said bolt slidable in said guideway and somating in said guideway that as the door is opened the arm is caused topivot relative to the jamb post, an abutment at the end of the armlimiting the sliding movement and hence the opening movement of thedoor, spring means urging said bolt into operative inter-engagement withsaid guideway, remote control means to retract the bolt from said arm,and means to connect said remote control means to a door lock to effectwithdrawal of said bolt from said arm upon operating the door lock toopen the door.

2. A fastening device for doors comprising an arm, a lengthwise guidewayin said arm, a bracket member adapted to be mounted on the jamb post ofa door, means pivotally connecting one end of said arm to said bracketmember, a housing adapted to be mounted on the door, a bolt slidable insaid housing and projecting at one end beyond one end of said housing, ahead on the latter end of said bolt slidable in said guideway and somating in said guideway that as the door is opened the arm is caused topivot relative to the jamb post, an abutment at the end of the armlimiting the sliding movement and hence the opening movement of thedoor, spring means urging said bolt into operative interengagement withsaid guideway, a cam driver pivoted in said housing, an abutment on saidbolt engaged by said cam driver, a link connected at one end to said camdriver and extending outwardly from said housing, a lever to which theother end of said link is connected, said lever being attachable for itsoperation to a rotary actuating member of a door lock.

3. A fastening device for doors comprising an arm, a lengthwise guidewayin said arm, a bracket member adapted to be mounted on the jamb post ofa door, means pivotally connecting one end of said arm to said bracketmember, a housing adapted to be mounted on the door, a bolt slidable insaid housing and projecting at .one end beyond one end of said housing,a head on the latter end of said bolt slidable in said guideway and somating in said guideway that as the door is opened the arm is caused topivot relative to the jamb post, an abutment at the end of the armlimiting the sliding movement and hence the opening movement of thedoor, spring means urging said bolt into operative inter-engagement withsaid guideway, and means to interconnect a lock mounted on the door withthe said bolt in suchmanner that operation of the lock causes withdrawalof the bolt.

4. A fastening device for doors according to claim 3, wherein said armis a rod like member and the said guideway is a channel extending fromthe pivoted end of the arm but terminating short of the other end, thehead of said bolt being overlapped by the opposed longitudinal outeredges of said channel and being obscured by the arm where accommodatedtherein, the periphery of said arm adjacent to its pivoted end beingformed with a cam-like depression merging into the said channel toafford a camber over which the head of the bolt can be pressed againstthe influence of the spring so as to press the head into said channel,said cam-like depression increasing the width of the channel inalignment with the bolt when the door is closed to afford a gap throughwhich the bolt may be retracted from said arm.

5. A fastening device for doors according to claim 3, wherein said armis pivoted on a vertical axis so as normally to lie co-axial with thebolt, the said guide being an undercut channel extending along the armand open at its end of the arm adjacent to its pivoted support toreceive the head of the bolt, the other end of the channel beingterminated short of the free end of the channel and the said head havinga radiused rim to facilitate its engagement by lateral pressure into theopen end of said channel due to the closing of the door, spring meanswith the pivot of said arm returning the arm to its normal position.

References Cited in the file of this patent UNITED STATES PATENTS388,074 Reardon et al Aug. 21, 1888 1,673,189 Frank et al. June 12, 19282,369,136 Chambers et al. Feb. 13, 1945 FOREIGN PATENTS 11,631 GermanyMar. '11, 1880 27,786 Great Britain Mar. 10, 1910 322,971 Germany July13, 1920

